China’s Beijing-Tianjin-Hebei region, also known as Jing-Jin-Ji, presents a compelling opportunity to highlight the potential—and the challenges—in transitioning to a more sustainable economic growth model. The Chinese government has prioritized the regional economic integration of Jing-Jin-Ji—a rapidly developing economic cluster that accounts for roughly 10 percent of China’s annual GDP—to spur development. Jing-Jin-Ji’s Hebei province, home to some of China’s largest steel and iron manufacturers, and to some of the most polluted cities in the world, is a key focus of the Chinese government’s industrial efficiency improvements and air quality control. Given the region’s diverse economic mix, strong policy and regulatory environment, and central location in China, Jing-Jin-Ji has the potential to dramatically reduce emissions and set the tone for China’s transformation toward a more sustainable growth model. Changes already taking place in the region are just a microcosm of what will soon begin happening nationwide if on-the-ground implementation matches up to government aspirations. With this paper, we outline a vision for a sustainable economic transition in the Jing-Jin-Ji region, which we hope will ultimately inspire a similar transition across China.